Paper Title:
Free Volumes in Polymer Nanocomposites
  Abstract

We have employed positron annihilation lifetime spectroscopy to measure the free volumes in nanocomposites of polystyrene with addition of carbon nanofiber (CNF) and carbon dioxide as a function of composition and of temperature. We found that the glass transition temperature (Tg) increases as a function of CNF compositions but significantly decreases as the exposure of CO2. We also investigate the combination effect of CNF and CO2 and found that the CO2 significantly weakens the bonding between PS and CNF interfaces. The Tg changes are compared with DSC.

  Info
Periodical
Edited by
S. J. Wang, Z. Q. Chen, B. Wang and Y. C. Jean
Pages
177-179
DOI
10.4028/www.scientific.net/MSF.607.177
Citation
H. M. Chen, L. J. Lee, J. T. Yang, X. H. Gu, Y. C. Jean, "Free Volumes in Polymer Nanocomposites", Materials Science Forum, Vol. 607, pp. 177-179, 2009
Online since
November 2008
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